Hub and plate assembly



Nov. 16, 1943. A w, EVANS 2,334,320

HUB. AND PLATE ASSEMBLY Filed April 9. 1943 FIC3.|.

I NVENTOR Ana/sou W. E VANS BY//@w@ A TTORNEY v in an improvedassemblycf a.

Patented Nov. 1 6 1943-: I 1

. mensxltoirington, 0.1mm, 555x992; tsilu tonManufacQzuriggQo 1'llqgringpog Thisfi jm zeintien relegfies end semblies, andmere'pgrpicula plate is coiinecped, The form of conn unitery ia ie'c'eof; meta 5 1 1S; Q. practical econciiiicgliil lf v place as.separeteelements, pgoy gecl a pe iika new, rugged, !Qw' 1Q t iQ n-19fi.on flan hemisbetween such 616111611135. 11; is t9 the attain em; of tpiscbject theta ,thef iI lV directed. c I A fu rt ll er object cf n? nvenion is l ea i with ofeviqus savip gs i n fqmx a Yet anctlgenopject of the, 1

ment secured jheretq, which tendency of the parts te pear from Figs. 1and 4 that, in assembly, 'theplate M will snugly bear against a seatingface I5 which thus constitutes a shoulder or abutment;

for the plate." ",i Tlie-sliapeand prererreap e on,

tions of the hub element'a's initially formed/and before assembly to theplate, are best shown in extension Hi, all of which is hollow, but ;the-extreme end of which is undercut somewhat inwardly of the end toprovide cupped :portion ll for a purpose more fully appearing'indater'de'- scription. The hub as a whole is by preference 7 sists in theformation of a collar portion or shoulder 26 beyond which is extended asecurement shank portion 21, the extreme end 28 thereof being upset in acountersunk recess 30 in' the plate, three of which are shown. In caseof the utilization of driving or securement pins 25 in or on the platel4, it is a preferenceto locate the openings 30, hence the pins 25 inangular register 7 or coincidence with, but radially outward of thespline seats 2|, for a purpose hereinafter better Fig. 4. Beyond the theshoulder I3 is' a hub j. Referring now to the manner of assembling theappearing.

' separately completed hub and plate elements, a

first step consists in insertion of the hub extension 1 }l6 through theaperture 20' of the plate, with the 1; gplate'seated against'theshoulder or abutment l3 of relatively heavy wall constructiqnya d iiiflalso preferred for most usages that the Wall about the cupped portionI"! be of considerable thickness; This. latter ,wallp ortion, intheiOIl'llafiQIl Qf the l i a plurality of equiangularly. spacedlones,shown as;-;three in the present exa m ple. Theimat'erialT ai n esiia aha t one b t .I'ir

lti g; t t Y new es i some wardlyto ;.resu lt a; plurality. shown, asthree,

divergent; tongue or, spline elements, {l 31 Q As will" p ar. qm .E

. and-{lithe .tengpe qris nnes l8, as formed froin'partsof,theirlaterialoflthe.

wall defining thecup portion l'l,

with respegt-toeachpther, an 32.0 has adiedivergent I tinctlyradial aswfell as axial trend. f. Thelresult ing splinesinthe examplenown'inies11y;p e ect s';to the .axis, and

t9 i, a "plane y likewise in.the s aine an normal to the axis.

R.eierring,n0w to theplate element. ,Uifthis,

similarly. tothe'hub; may afi l meavari y' forms dependinguponflparticular adaptability'for i usage, and will'usually'be'circula'r in'plan as suggested by Fig. 5,*and is provided with acentral hub ieeeivi g opening zaf j'rhe opening 26 is or generallycircular shape, but departs therefrom in that. the-plate is provided incommunication with the opening 20, with.

grooves '2l, .three of which 'aresliqwn, each'beefol fl 'a plurality ofspline ing r substantiallyfrctangular jsnap and u mensioned toconformwith not .much more than i a working clearance to the s'plines[8, hence adapted in assembly'as will now have; appeared, to: enable theplate, l'4jftof'be inserted over the extension l6 ofthehubwithfthegsplinesj l8 projectingthrough groove's2l.,

The margin defining the' shaft opening 20 is further [given a specialformation exemplified by providing a sharply, apexe'd, sawtoothperiphery, in whichItheindents 'are of somewhat lesser radialextentthangare thespline groove :Iheserrated'periphery of theshaftf'openmg s, as to the serrations 22 and intervening indents 23,thusthis feature in combinationjwith a hub element,

substantially shown, described and claimed' in Letters'PatentNo.2,272,695issued to this appli cant February 10', 1942', andv assigned to'lhe" Torrington Manufacturing Company. I

In furtherreferencefto "the plate l4,.th1 element maybe provided withsuitable openings such as 24 in any suitable number and arrangement, sixthereof being shown in order to receive rivets. or'like securement,elements as for attachment, for 1 example, "ofthe backplate of acentrifugalblower wheel. When the plate is" utilized as an element of acouplingdevice, it is advan-- tageously P ovided with driving lugs 'orpins indicated generallyatfZS (-Fi "-1) A convenient methodofsecureme'nt 'of pins of this 'typecon- =18 extended through the splinegrooves 2|.

will be observed also that while the splines prosubstantially as shownby Fig. 4 wherein the plate is indicated in dotted lines, and with thesplines It J'ectisomewhatbeyondthe plate in an axial direction, theintervening wall portions of the cup I! similarly project.'considerablybeyond the plate.

A ;finish assembly operation is now efiected by supporting the hub in asuitable holding jig or the like, and swagingtheextended end portions ofthe, splines 18 firmly outwardly against theouter surfaceportionoftheplate adjacent the; hub

aperture. "The splines arethus beaded over, but

pleted as'by a high-speed hammer.

"At. the same operation, or if desired, as a preceding or' succeedingoperation, the remaining extended portion of the 'hub' neck, being thewall f of the cupiportion l'l intervening the splines, is swaged as'gbythe high speed hammer, backfirmly ,aga'inst theteeth 23 and into theflange serra tionsZZj'From this, as will appear from the drawin there isformed a substantially continuousbead. or collarappearing at the end ofthe assembly just "outwardly of 'the'h'ub opening of the plate. Not onlyis themetal of the hub neck j forced firmly into thefserrations 22 I andthe splines firmly locked in the spline grooves, but

theserrations and teeth are completely covered.

The initial length of metal in the 'hub extension I6-l'|is' such thatthe bead'resulting upon com-' pletion of assembly and indicated at 3 I,approximates in outside diameter the shoulder l3 as will readily appearfrom Figs. 1 and 7. It now becomesfapparent'that the inner periphery ofthe plate l4 adjacent the hub extension is firmly embraced,substantially over 360 degrees, between the bead 3| and the shoulder l3.Further assembly operations as in application of the flange and hub tothe shaft and-rotor elements need not be herein described since theywill vary considerably with which the present objectives abovespecifically stated, and others implied from the more detaileddescription.

Although the invention has been depicted by making a complete'disclosureof onespecific em-' bodiment, thedetail of description is tobe'understood solely in an instructive rather than in any limitingsense, since many changes are possible the claims hereunto appended.

;I claimas my invention:

within the scope 'ofthe invention as defined by I li'lna hub andplateassemblyga plate pro vided with an axial hub apertureiahubprovidedi with a tubular end portion extending through the hub aperture,a part of said tubular end portion being deformed outwardly to form aspline, the plate being recessed near the hub aperture to rovide aspline groove conforming closely to the cross sectional shape of thespline, the spline projecting beyond the spline groove with itsprojecting portion upset into firm engagement with the adjacent portionof the plate.

2. In a hub and plate assembly, a plate provided with an axial hubaperture, a hub provided with a tubular end portion extending throughthe hub aperture, a part of said tubular end por cross sectional shapeof the spline, the spline projecting beyond. the spline groove with itspro jecting portion upset into firm engagement with.

the adjacent portion ofthe plate, and the remainder of the tubular endportion, beyond the plate, being deformed into firm holding engagementwith the plate, about the hub aperture thereof.

3. In a hub and plate assembly,- a plate provided with a hub aperture, ahub provided with a shoulder inwardly of one end, and the end beyondsaid shoulder being of tubular formation, a portion of said tubular endbeingdeformed outwardly to constitute a spline, the plate being recessednear the hub aperture to provide a spline conforming seat, and the endof the spline being deformed against the adjacent material of the plateand coacting with the shoulder to grip the plate and preclude axial orangular displacement thereof on the hub.

4. A hub and plate assembly including a centrally apertured plate, a hubprovided with a tubular end portion and formed to provide an abutmentfor the plate inwardly of the end portion, the tubular end portionhaving spaced parts of its wall divergently struck outwardly toconstitute hub splines, the plate being recessed just outwardly of itshub Opening, with the recesses conforming in shape and area to theadjacent cross sections of the splines, and the splines and interveningportions of the tubular end of the hub being swaged into firm engagementwith the material of the plate adjacent the center opening thereof.

5. In an assembly of the character described, a hub, a hollow endthereon, a shoulder inwardly of the hollow end, spline portionsconstituted by radially upset marginal portions of the hollow end, aplate on said hollow end, said upset portions projecting beyond theplate when seated on the hub, and the projecting portions being deformedagainst the plate.

6. In a plate and hub assembly of the character described, a hub elementhaving outwardly and axially extending splines formed nearone end, aplate abutment spaced inwardly from said end,

a plate overlying the hub and seated against said abutment, the platebeing provided with spline grooves, and the splines projecting beyondsaid plate and deformed into holding engagement with the material of theplate adjacent the hub, whereby to prevent relative axial and angulardisplacement of the hub and plate.

7. In a hub and plate assembly, a plate provided with an axial hubaperture, a hub extended through said aperture, and provided with ashoulder, and a relatively heavy walled tubular end beyond saidshoulder, a portion of said tubular end projecting radially beyond theremainder thereof to constitute a spline, the plate being recessed nearthe hub aperture to provide a conforming seat for the spline, a pincarried by the plate and having a portion projecting therebeyond, theend of the spline being deformed into firm engagement with the materialof the plate adjacent the hub, and in engagement with the pin in amanner tending to prevent displacement of the pin in the plate.

8. The combination and arrangement of elements substantially asdescribed in claim '7 but further characterized in that the pin isprovided with a shoulder adjacent the plate, and that the end of thespline is further deformed into engagement with said shoulder for thepurpose noted. a

9. In an assembly of the general type described, a plate centrallyapertured to receive a hub, a hub provided with a tubular portionextending throughthehub aperture in the plate, the plate being furtherprovided with cutaway portions in the region of the hub aperture, andangularly spaced, relatively enlarged recesses constituting splinegrooves, the said tubular portion of the hub being deformed in angularlyspaced zones to constitute splines occupying said spline grooves, andthe end portions of the splines and the intervening portions of thetubular hub extension being deformed outwardly in such manner that theends of the splines and the hub portions adjacent the outer face of theplate are in firm securement with the plate about the region of the hubaperture.

10. In a hub and plate assembly, a hub provided with an annular shoulderinwardly of one end, and a tubular portion beyond said shoulder, a plateprovided with a hub aperture overlying the hub, and the plate beingseated against said shoulder, the hub'being provided with at least apair of radially and axially projecting splines,

and the plate being provided further with recesses "adjacent the splinegrooves.

ADDISON W. EVANS.

